Odd starting issue

Teefivetee
Club4AG Regular
Posts: 11
Joined: Wed Apr 15, 2015 4:22 pm

Odd starting issue

Postby Teefivetee » Thu Jul 23, 2015 6:58 pm

Weird issue

Car woudlnt start from time to time. My open circuit relay would click like crazy when idling allall the time. Fortunately I was close to home, itdidn't start for like 20 min. Came back with a spare relay. Started. Now say the car idles low for a second the relay will click. Was it really the relay? Did I get lucky? 87 gts

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jondee86
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Posts: 2939
Joined: Fri Jan 11, 2013 10:21 pm
Location: Wellington, New Zealand

Re: Odd starting issue

Postby jondee86 » Fri Jul 24, 2015 10:01 pm

COR is switched by the flap in the AFM opening. If there is not enough air
getting sucked into the AFM, the flap won't open far enough to hold the COR
contacts closed. If the flap is hovering right on the point of switching between
ON and OFF, it could be causing the COR to click.

Check that the flap is free to move (not got any crap caught under the edge)
and check that there is not a split (vacuum leak) in the ducting between the
AFM and the throttlebody. If there is a split in the duct, the engine will likely
be idling lower than usual

Cheers... jondee86
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore, all progress
depends on the unreasonable man.